Question

我的目标是在python中创建一副牌的列表。我正在使用itertools.product。以下代码创建了正确的列表，但是，它仅在for循环中有效。

如何在for循环之外存储和使用列表？

打印圈内循环列表：

#CARDS#
import itertools
rank = ["2", "3", "4", "5", "6", "7", "8", "9", "T", "J", "Q", "K", "A"]
suit = ["h", "d", "s", "c"]

for card in itertools.product(rank, suit):
    card_deck = card[0] + card[1]
    print card_deck

输出：

2h 2d 2s 2c 3h 3d 3s 3c 4h 4d 4s 4c 5h 5d 5s 5c 6h 6d 6s 6c 7h 7d 7s 7c 8h 8d 8s 8c 9h 9d 9s 9c Th Td Ts Tc Jh Jd Js Jc Qh Qd Qs Qc Kh Kd Ks Kc Ah Ad As Ac

打印循环列表

for card in itertools.product(rank, suit):
    card_deck = card[0] + card[1]
print card_deck

输出：

AC

Answer 1

问题在于，当您完成循环后，card_deck仍然具有最后一个值。如果你想要所有的值，那么你需要将它们存储在某个地方...也许是一个列表：

card_deck = []
for card in itertools.product(rank, suit):
    card_deck.append(card[0] + card[1])

print card_deck

这看起来像列表理解的真正好候选人：

card_deck = [card[0] + card[1] for card in itertools.product(rank, suit)]

使用Python中的itertools.product从for循环的输出创建列表

1 个答案: